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针对松嫩平原北部盐碱障碍型土壤,采用一年“土层置换+秸秆阻断”(SD1)、连续两年“土层置换+秸秆阻断”(SD2)和秸秆粉碎覆盖(CK)三种耕作方式,研究了对土壤物理性状、养分含量及盐分含量的改良效应。结果表明:0~40cm土层土壤容重和pH,SD2处理低于SD1及CK,容重分别降低8.61%和8.81%;土壤含水量,SD2处理高于SD1和CK;0~40cm土层土壤可溶性盐离子,SD2处理土壤可溶性盐分含量明显降低,达到了降低土壤耕层盐分的目的;SD2处理产量高于SD1处理和CK,SD2和SD1产量分别高于CK 7.83%和3.89%,差异达到显著水平。
Aiming at the saline-alkali barrier soil in the northern part of Songnen Plain, the soil was replaced by “soil layer replacement + straw blockade” (SD1) for two years in succession, and the soil layer replacement + straw blockage (SD2) (CK) three farming methods to study the soil physical properties, nutrient content and salt content of the improved effect. The results showed that soil bulk density and pH, SD2 treatments were lower than SD1 and CK treatments in 0 ~ 40cm soil layers, and the bulk density was reduced by 8.61% and 8.81% respectively. Soil water content was higher in SD2 treatment than in SD1 and CK treatments. Soil soluble salts in 0 ~ 40cm soil layer Ions and SD2 significantly decreased soil salinity. The yield of SD2 was higher than that of SD1 and the yields of CK, SD2 and SD1 were higher than that of CK by 7.83% and 3.89%, respectively, and the difference reached significant level.